package lab02.test06;

import java.util.Scanner;

/**
 * Created by 林云志 on 2017/10/14.
 */
public class Circle {
    public static void main(String[] args) {
        double radius;
        System.out.println("请输入圆的半径");
        Scanner circle = new Scanner(System.in);
        radius = circle.nextInt();
        System.out.println("圆的面积为：" + area(radius));
        System.out.println("圆的周长为：" + perimeter(radius));
    }
    static double area(double radius){
        double area = Math.PI*radius*radius;
        return area;

    }
    static double perimeter(double radius){
        double perimeter = 2*Math.PI * radius;
        return perimeter;
    }
}
